Thirteen percent of the world 1966 petroleum production came from the nine countries of the Latin American-Caribbean region with established production records. They produced a total of 1550 million barrels, a decrease of 0.97 percent from 1965. Of the total, Venezuela produced 79 percent, a decrease of 2.9 percent, but still approximately four times the total produced by the other eight countries. Bolivian production increased 81 percent, largely as a result of the completion of the Trans-Andean pipeline to tidewater. Other increases ranged from 24 percent in Brazil to 6 percent in Argentina. Exploration, both geologic and geophysical, decreased moderately from 1965 in the region as a whole. Reports on the individual countries of the region are presented by authorities on each of the areas.